2.3 HYDRAULIC CONNECTIONS
Domestic water
Supply net pressure is to vary from 1 to 6 bar. Install a reduction in case of higher
pressure. Supply water strenght influences the cleaning frequence of the exchange
serpentine pipe.
The possibility of installing water treatment adequate appliances depends
on water caracteristics.
System loading
Slowly open the loading cock up to reaching about 1 bar system pressure, which can be
controlled through the pressure gauge situated on the facial panel. Close the evacuation
cock again.
Make the radiator air bleed using the proper manual valves.
When the system is cold set the system temperature at 1 bar.
In case of installation of the boiler in local
where the temperature environment can
go down below 0°C, we recommends you
to fill the heating system with antifreeze
solution.
You advises to use solutions of glicole
already diluted for avoiding the risk of
uncontrolled dilutions.
ETHILIC
GLYCOLE (%)
FREEZING
TEMPERATURE (°C)
6 0,00
10 -3,90
15 -6,10
20 -8,90
25 -11,70
30 -15,60
40 -23,40
50 -35,50
Suggestions and advice to avoid system vibrations and noises.
•
avoid the use of pipes with reduced diametres;
•
avoid the use of bends with reduced radius;
•
it is better to have a hot system cleaning in order to eliminate all the impurities coming from pipes and
radiators - particularly oil and fat substances - which might damage the circulating pump.
e dai radiatori (in particolare oli e grassi) che rischierebbero di danneggiare il circolatore.
2.4 ELECTRIC CONNECTIONS
The boiler is set to work with a 230V / 50Hz single-phase tension. Connections have to be effectuated by
means of proper cables which come out of the boiler.
There is also an external cable for the ambient thermostat. Connect the thermostat after having eliminated
the jumper on the T.A cable terminal.. ( ATTENTION:
the T.A. connection works by net tension; therefore,
you should use plastic models or if they are made by metal you shuold connect them to an efficient earth
system).
The boiler connection has to be protected by means of a 2 pole isolator and a proper fuse (1A).
The appliance has to be connected to an efficient earth system.
Follow present local regulations about safety.
N.B.: respect the phase and neutral position: an eventual inversion of these two positions results in a block of
the ignition panel.
N.B.: ARCA srl declines every kind of responsability for damages to persons, animals or things caused by
the lack of a proper earth system connection and local regulation attention.
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Summary of Contents for PIXEL 25 FC
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